Fig. 2: Correlated disorder.

a1–a4 Superconductor with correlated disorder. Color density plot with the spatial distribution of the gap function Δ_1i (a1) and Δ_2i (a2) for the strong and the weak band, respectively, at temperature \(T=0.9\,{T}_{c}^{(0)}\). a3 temperature dependence of the sample-averaged gap function \({\bar{\Delta }}_{\nu }\) for the strong band ν = 1 (red) and the weak band ν = 2 (blue), showing results for the cases when strong band is disordered (filled circles) and in its clean limit (empty circles). a4 Homogeneous contribution \({\Delta }_{2}^{(0)}\) to the gap in weak band ν = 2, compared between numerical calculations (circles) and estimates using Eq. (7). b1–b4 Superconductor with 1D superstructure. Color density plot with the spatial distribution of the gap function Δ_1i (b1) and Δ_2i (b2) at temperature \(T=0.9\,{T}_{c}^{(0)}\). b3 Temperature dependence of the sample-averaged gap function \({\bar{\Delta }}_{\nu }\) for the strong band ν = 1 (red) and the weak band ν = 2 (blue), showing results for the cases when strong band is disordered (filled circles) and in its clean limit (empty circles). b4 Homogeneous contribution \({\Delta }_{2}^{(0)}\) to the gap in weak band ν = 2, compared between numerical calculations (circles) and estimates using Eq. (7). c1–c4 Superconductor with 2D superstructure. Color density plot with the spatial distribution of the gap function Δ_1i (c1) and Δ_2i (c2) at temperature \(T=0.9\,{T}_{c}^{(0)}\). c3 Temperature dependence of the sample-averaged gap function \({\bar{\Delta }}_{\nu }\) for the strong band ν = 1 (red) and the weak band ν = 2 (blue), showing results for the cases when strong band is disordered (filled circles) and in its clean limit (empty circles). c4 Homogeneous contribution \({\Delta }_{2}^{(0)}\) to the gap in weak band ν = 2, compared between numerical calculations (circles) and estimates using Eq. (7).